Butterflies of Warwickshire, Coventry and Solihull
White-letter Hairstreak
Satyrium w-album


The White-letter Hairstreak has a single brood flying from the beginning of July to mid August. May emerge earlier after a warm spring. The White-letter Hairstreak is a small butterfly which has an erratic flight. It is a difficult butterfly to find and is rarely seen as it spends the majority of its time high up in trees feeding on the honeydew produced by aphids. On rare occasions, it can be found feeding on Creeping Thistle, Ragwort or Bramble blossom. The uppersides are only seen in flight as the butterfly always settles with its wings closed.

Larval Food plants
Wych Elm (Ulmus glabra)
English Elm (Ulmus procera)
Small-leaved Elm (Ulmus minor)

Habitat Requirements
Sheltered hedgerows and woodland rides where Elms grow. Population numbers have been affected by the introduction of Dutch Elm Disease into the UK

Warwickshire Status
Resident

Where to see the White-letter Hairstreak
Ryton Wood (WWT Reserve)
Other Species
Please select an alternative species from the list below.

White-letter Hairstreak
© Steven Cheshire - Larvae on Elm at Ryton Wood, Warwickshire
First Sightings
First sighting dates are based on records of White-letter Hairstreak submitted online. Please note that these dates are not updated retrospectively to include records submitted to the branch recorder in other forms.

30/06/2010 - Oxhouse Farm North
27/06/2009 - Oversley Wood
13/07/2008 - Ryton Wood
19/06/2007 - Ryton Wood
White-letter Hairstreak White-letter Hairstreak
© Steven Cheshire - Warwickshire   © Steven Cheshire - Larvae on Elm atRyton Wood, Warwickshire
Adult Flight Times
The flight chart below is based on observations of the adult White-letter Hairstreak in Warwickshire between 2005 and 2008. Peak periods are shown in dark green.
White-letter Hairstreak Flight Chart
Warwickshire Distribution Maps base on Vice County (CV38) which includes Coventry and Solihull
Distribution of the White-letter Hairstreak during the indicated period.

Key to Warwickshire Maps: sightings 12-910+
White-letter Hairstreak - 2007 records / distribution.   White-letter Hairstreak - 2008 records / distribution.   White-letter Hairstreak - 2009 records / distribution.   White-letter Hairstreak - 2000 to 2009 records / distribution.
2007 Distribution Data (1yr)   2008 available soon   2009 Distribution Data (1yr)   2000-09 Distribution Data (10yr)